Carla/source/widgets/digitalpeakmeter.hpp

/*
 * Digital Peak Meter, a custom Qt4 widget
 * Copyright (C) 2011-2013 Filipe Coelho <falktx@falktx.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * For a full copy of the GNU General Public License see the GPL.txt file
 */

#ifndef __DIGITALPEAKMETER_HPP__
#define __DIGITALPEAKMETER_HPP__

#include <QtCore/QTimer>

#if (QT_VERSION >= QT_VERSION_CHECK(5, 0, 0))
# include <QtWidgets/QWidget>
#else
# include <QtGui/QWidget>
#endif

class DigitalPeakMeter : public QWidget
{
public:
    enum Orientation {
        HORIZONTAL = 1,
        VERTICAL   = 2
    };

    enum Color {
        GREEN = 1,
        BLUE  = 2
    };

    DigitalPeakMeter(QWidget* parent);
    ~DigitalPeakMeter();

    void displayMeter(int meter, float level);
    void setChannels(int channels);
    void setColor(Color color);
    void setOrientation(Orientation orientation);
    void setRefreshRate(int rate);
    void setSmoothRelease(int value);

    QSize minimumSizeHint() const;
    QSize sizeHint() const;

protected:
    void updateSizes();

    void paintEvent(QPaintEvent* event);
    void resizeEvent(QResizeEvent* event);

private:
    int fChannels;
    int fSmoothMultiplier;
    int fWidth, fHeight, fSizeMeter;
    Orientation fOrientation;

    QColor fColorBackground;
    QLinearGradient fGradientMeter;

    QColor fColorBase;
    QColor fColorBaseAlt;

    float* fChannelsData;
    float* fLastValueData;

    QTimer fPaintTimer;
};

#endif // __DIGITALPEAKMETER_HPP__